Welding jig and electronic assembly

The utility model discloses a welding jig and an electronic component, and the welding jig comprises a jig seat which comprises a jig body, and a first limiting block and a second limiting block which are arranged on the jig body; the jig body is provided with a placing position, and the placing position is configured to place a heat transfer piece; the first limiting block is close to the placing position and is provided with a first limiting surface facing the first direction, an assembling space is formed between the second limiting block and the placing position, a first avoiding gap is formed between the second limiting block and the first limiting block, and the second limiting block is provided with a second limiting surface facing the placing position; the second limiting surface and the first limiting surface are enclosed to form a mounting position, the mounting position is configured to be used for mounting the heat dissipation piece, and the mounting position is communicated with the placing posit